Heating performance characteristics of stack coolant source heat pump using R744 for fuel cell electric vehicles
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
The objective of this study is to investigate the performance characteristics of a stack coolant source heat pump using R744 with a stack coolant heat source for fuel cell electric vehicles under cold weather conditions. Electric heaters are currently used in fuel cell electric vehicles, and the high levels of energy consumption involved lead to lower fuel efficiency and a reduction in the vehicle’s driving range. In order to improve the efficiency of the fuel cell electric vehicles in this study, a heat pump using R744 as a refrigerant and making use of wasted heat from the stacks is developed to cover the heating capacity. This heat pump is tested and performance optimized for stack coolant heat recovery under the compressor speeds, air temperatures, and flow rates of the interior heat exchanger, as well as the coolant flow rates of the CO2-coolant heat exchanger. In addition, the heating capacity of the tested system was sufficiently attained over 5.0 kW at the coolant flow rate of 5.0 l/min under extremely cold weather conditions of −20°C.
- P. Neksa, CO2 heat pump systems, Int. J. Refrigerant, 25 (2002) 421–427. CrossRef
- A. Hafner, J. Pettersen, G. Skaugen and P. Neksa, An automobile HVAC system with CO2 as the refrigerant. In: Natural working fluids, 1998 IIR-Gustav Lorentzen conference, Oslo, Norway (1998).
- S. C. Kim, M. S. Kim, I. C. Hwang and T. W. Lim, Heating performance enhancement of a CO2 heat pump system recovering stack exhaust thermal energy in fuel cell vehicles, Int. J. Refrigerant 30 (2007) 1215–1226. CrossRef
- ANSI/ASME, Measurement uncertainty, ANSI/ASME PTC 19-1-1985, Part 1 (1985).
- R. J. Moffat, Uncertainty analysis in the planning of an experiment, J. Fluids Engineering, 107 (1985) 173–178. CrossRef
- ANSI/AMCA 210, Laboratory methods of testing fans for rating, ANSI, Arlington (VA) (1985).
- ASHRAE Standard 116, Methods of testing for seasonal efficiency of unitary air-conditioners and heat pumps, ASHRAE, Atlanta (GA) (1983).
- M. Y. Lee, C. W. Cho, H. S. Lee, D. Y. Lee, Y. C. Park and J. P. Won, Performance characteristics of a simultaneous hybrid heat pump using coolant and air sources for an electric bus, Int. J. of Energy (2011) in Review.
- C. W. Cho, M. Y. Lee, H. S. Lee, D. Y. Lee, S. T. Oh and J. P. Won, Heating performance characteristics of a coolant source heat pump using wasted heat of electric devices for an electric bus, JMST (2011) in Review.
- Heating performance characteristics of stack coolant source heat pump using R744 for fuel cell electric vehicles
Journal of Mechanical Science and Technology
Volume 26, Issue 7 , pp 2065-2071
- Cover Date
- Print ISSN
- Online ISSN
- Korean Society of Mechanical Engineers
- Additional Links
- Heat pump
- Fuel cell
- Coefficient of performance (COP)
- Industry Sectors
- Author Affiliations
- 1. Thermal Management Research Center, Korea Automotive Technology Institute, 74 Yongjung-Ri, Pungse-Myun, Chonan City, 330-912, Korea
- 2. Department of Mechanical Engineering, Korea University, Seoul, 136-701, Korea